Spark-plug terminal



April 2, 1929- w. M. WILCOX 1,707,292

SPARK PLUG TERMINAL Filed Nov. 1927 INVENTOR.

A TTORNE Y.

Patented Apr. 2, 1929.

WILLIAM MARION XVILCOX, OF ELEERTCPN, GEORGIA,

SPARK-PLUG TERMINAL.

Application filed'll'uvcmber 1, 1927. Serial No. 230,224.

This invention relates to terminals for electrical conductors or contacting means between an electric terminal and a conduc tor.

It is an object of tliis 'iu'ventimi to provide a novel mutant or hearing plate to be associated with conductors and termil'ials, effective to increase the size of the path of travel for current and to insure a metal to metal contact, free of coatings which might retard the passage of current.

It is furthermore an object of the invention to provide a device oi? this character which will aid in retaining a binding nut properly set with respect to the said conductor.

It a further object of this invention to produce a contact plate to be associated with a conductor tip in which a wiping action is effected when the conductor tip and contact plate are assembled, to h'isure the afore- SthllllGt-ill to metal engagement of the elements for increasing the eiliciency.

It is furthern'iore an object to produce a contact plate and a conductor tip which, in their assembled state, may be applied to a binding post or a spark plug electrode prior to the application of the binding nut to the said post or electrode.

With the foregoing and other objects in View, the invent-ion consists in the details of construction, and in the arrangement and combination of parts to be hereinafter more :lully set fortl'iand claimed.

In describing the invention in detail, reference will be had to the accompanying drawing forming part of this application, wherein like characters denote corresponding parts in the several views, and in which Figure 1 illustrates a view in elevation of i a spark plug showing a device embodying the invention applied thereto;

Figure 2 illustrates a sectional View of the contact plate prior to its being shaped as it is shown in Fig. 1;

Figure 3 illustrates a sectional view of an assembly having a slightly modified con struction;

Figure 1 illustrates a plan view of the plate;

Figure 5 illustrates a plan View of the contact plate and conductor tip associated with a terminal; and

Figure 6 illustrates a perspective view of a fragment of the contact plate exaggerated to show the burr formed when the plate is anchoring it to the coiuluctor. As the man nor of connecting the plate and conductor may be changed to suit particular require meats, the inventor does not wish to be limited with respect to the manner of accomplishing the foregoing. The contact plate which is employed in association with the conductor terminal in the form shown in Figures 1 and 2 comprises a. plate having apertures 14 and 15 near each end which are intended to register or aline when. the plate doubled on. itself, as shown in llig. 1, and the said apertures are also intended to aline with an aperture 16 termed in the conductor tip, and the said aliuod apertures are intended to receive a binding post or electrode.

The conductor plate and lG-lll'lllllll tip are, of course, assembled prior to their being applied. to the binding post and, in assembling them, the plate and tip are moved for the purpose of inserting the tip between the parallel portions of the plate, Preferably the space between the parallel portions of the plate is normally slightly less thzni the thickness of the tip and, tl1erci.ore, triction develops when the tip and plate are assembled, resulting in. a wiping action which serves to dislodge grease or coatings from the contacting surfaces, and this results in increasing the conductivity of the assel'nbly, as compared with that which would occur should there be interposed deposits of grease or other foreign substances. The plate also acts as a washer which will prevent movement of the tip being communicated directly to the nut and, in practice, this has been found to cause the nut to hold on the threads to better advantage.

In the modifications illustrated in Figs.

3, 4; and 5, the plate 17 is shown as having a burr 18 around each 01 the apertures 19, this burr being formed when the plate is punched to form the said holes 19. it is well known, of course, that punching can be done without producing a burr and it can also be done by producing a burr. When this modified form of the invention is adopted,

tact which increases the conductivity of the assembly, and the burr can be so formed as to produce a yielding resistance to the binding nut, which'will increase the friction be tween the threads of the binding nut and 1 post.

I claim:

An assembly for electrical connections comprising a plate doubled on itself and separable from a coacting conductor, the superimposed portions of the plate having coinciding apertures adapted to receive an electric terminal, and a conductor tip fitted between the superimposed portions of the plate and having an aperture coinciding, With the apertures of the plate.

WILLIAM M. lVILCOX. 

